# S3XY Key Fob — Control your S3XY EV

> Remote control and status monitoring for Tesla vehicles via iOS and watchOS. (iPhone/iPad app by Kentaro Matsumae.)

- Source: https://appshunter.io/ios/app/s3xy-key-fob/id1570846677 (this page in markdown: same URL + `.md`)
- Developer: [Kentaro Matsumae](https://appshunter.io/developer/290852801)
- Category: Utilities, Productivity
- Price: $0.99
- Rating: 1.00/5 from 1 App Store ratings · 16 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 7 MB
- Languages: American English
- Released: 2021-06-05
- Data updated: 2026-08-13
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/s3xy-key-fob/id1570846677/reviews.md

## What is S3XY Key Fob?

A simple app for iOS/WatchOS to control your Tesla. From the app, you can lock and unlock the car, flash, horn, and open the flank. It also displays the battery level.

The app only accesses the API a minimal number of times. Therefore, Tesla's battery consumption will be kept to a minimum. Of course, your credentials and logs will not be sent to any server other than Tesla.

Have you ever been locked out of your Tesla because you left your iPhone or keys in the car? With this app, you can unlock your car from your Apple Watch in such a situation, making it very safe.

This app requires a Tesla account linked to a real Tesla car.

## Key features

- Lock/unlock vehicle
- Flash lights
- Honk horn
- Open trunk
- View battery level
- Apple Watch control

## Recent user reviews (10 of 16)

All indexed reviews: https://appshunter.io/ios/app/s3xy-key-fob/id1570846677/reviews.md

### 1/5 — 車両の切り替えが出来ない

*2024-10-01*

2台保有していますが、反映させたい方の車両への切り替えが出来ない
意味が無い　返金して欲しい

### 1/5 — Can not use

*2024-07-04, version 10*

Error code 403

### 1/5 — 緊急用で使えない

*2024-06-23*

まずネットワークエラーと出て応答してくれません。加えて、昨日インストールしたばかりなのにトークン切れ(サインアウト?)となり、ログインし直しが必要。スマホを車に入れっぱなしにしてしまい、閉じ込みが発生した時用に買いましたが使えません。買わない方が良いですよ。

### 1/5 — 使えない

*2024-03-21*

24.3.21エラーメッセージが出てきて、全く使えなかった。

### 3/5 — Cannot connect

*2023-12-29, version 10*

I can not use this watch app for a while
It tells:
Network error
Please check your internet connection .
Code = 400

### 2/5 — 突然つかえなくなりました。。

*2023-12-15*

いままでおおよそ問題なくつかえてましたが、（2023-12）突然command errorの表示がでるようになり使えなくなりました。充電率などのステータスは見れます。
前日に（何もしてないのに）テスラのアプリで、アンロックされました　との表示が出てたので駐車場までいくとたしかにアンロック状態になっており、テスラのサポートに調査依頼すると、サードパーティのアプリからリクエストとのことで、ちょっと疑ってます。。。

### 3/5 — いざという時に使えないことがあります

*2023-05-21*

アップルウォッチで操作出来るのは便利ですが、iPhoneを家に忘れて駐車場に行き、ドアを開閉しようとすると勝手にログアウトしてて動かない。しばらく起動してないならわかりますが、昨日起動したばかりです。緊急用と思いインストールしましたがこれならなくてもいいかなと思っています。

### 2/5 — Siriに対応してほしい。

*2021-12-14*

Apple Watchでは定期的にログアウトされる。
ちょっと不便ですね。

### 1/5 — Watch App won’t work

*2021-10-21*

On the watch it keeps saying “connecting to parent app” but it won’t load.

### 5/5 — 非常に便利です。

*2021-10-21*

Apple watch3で中々ペアリング出来ませんでしたが、iPhoneを14.8にアップデートしたら、すんなりペアリング出来ました。これでiPhoneの閉じ込めリスクが解消されました。便利なアプリありがとうございます。

## Frequently asked questions about S3XY Key Fob

### What can S3XY Key Fob do?

S3XY Key Fob allows you to lock and unlock your Tesla, flash lights, honk the horn, open the trunk, and check the battery level directly from your iPhone or Apple Watch.

### Does S3XY Key Fob require a Tesla account?

Yes, this app requires a Tesla account that is linked to a real Tesla car to function.

### How does S3XY Key Fob affect Tesla's battery consumption?

The app is designed to access the Tesla API minimally, ensuring that battery consumption on your Tesla is kept to a minimum.

### Is my Tesla account information secure with S3XY Key Fob?

Yes, your credentials and logs are only sent to Tesla's servers and are not transmitted to any other third-party server.

### Can I unlock my Tesla with my Apple Watch if I leave my keys inside?

Absolutely. The app provides Apple Watch control, allowing you to unlock your car from your wrist in situations where your iPhone or keys are locked inside.

### What devices does S3XY Key Fob support?

S3XY Key Fob is available for iPhone and Apple Watch, offering seamless control across your Apple ecosystem.

### How often is S3XY Key Fob updated?

The latest version is 10, and the app was last updated on December 5, 2023, indicating regular maintenance and potential feature additions.

### What is the price of S3XY Key Fob?

S3XY Key Fob is a paid application, available for a one-time purchase of $0.99.

## Version history (last 5 releases)

### 10 — 2023-12-05

Support Tesla's official Fleet API. You need sign-in again to enable it.

### 8 — 2023-09-02

bug fix and minor improvement

### 7 — 2023-03-06

Fix sign-in issue

### 6 — 2021-10-16

- Add " Air Conditioner" button 
- Add "Trunk" button
- Update iOS button layouts
- Add "Demo Mode". You can try this app even if you don't have real Tesla account.

### 5 — 2021-06-28

Update Apple Watch Complications icons design

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## More apps by Kentaro Matsumae

- [AnimeMaker Pro](https://appshunter.io/ios/app/animemaker-pro/id306785702)
- [Drummer Lite](https://appshunter.io/ios/app/drummer-lite/id405274410)
- [Anime Maker](https://appshunter.io/ios/app/anime-maker/id405622194)
- [おやことば](https://appshunter.io/ios/app/id595385014)
- [ペンライトZ](https://appshunter.io/ios/app/z/id606332398)

All apps by Kentaro Matsumae: https://appshunter.io/developer/290852801

## Related topics

[key fob remote](https://appshunter.io/ios/topics/key-fob-remote) · [key fob reader](https://appshunter.io/ios/topics/key-fob-reader)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-13.*